Fix DatePicker Display Issue

DatePicker was being displayed behind dialog box when adding new entries to applications.  This was caused by a z-index value being lower for the DatePicker than that of the dialog box containing it.  This branch bumps up the z-index value of the DatePicker making it display as intended. ![datepickerbehind](https://f.cloud.github.com/assets/709503/757369/e898f7d2-e693-11e2-8342-b5a991057ad4.png)